Turbocharger having adjustable-trim centrifugal compressor including air inlet wall having cavities for suppression of noise and flow fluctuations

The present invention relates to a turbocharger having adjustable-trim centrifugal compressor including an air inlet wall having cavities for suppression of noise and flow fluctuations. The present invention especially discloses a compressor for a turbocharger. The compressor includes an inlet-adjustment mechanism in an air inlet for the compressor, operable to move between an open position and aclosed position in the air inlet. The compressor housing upstream of the inlet-adjustment mechanism defines a series of acoustic cavities, and openings are defined in the compressor housing wall leading into the acoustic cavities. The openings and cavities are aimed at mitigating noise and flow pulsation in the air inlet caused when the inlet-adjustment mechanism is adjusted to the closed positionto effectively reduce the inlet diameter approaching the compressor wheel. 本发明涉及具有可调整TRIM且包括具有抑制噪声和流量波动的腔的空气入口壁的离心压缩机的涡轮增压器。具体公开了一种用于涡轮增压器的压缩机，其包括在压缩机的空气入口中的入口调整机构，该入口调整机构能够操作成在空气入口中的打开位置和关闭位置之间移动。压缩机壳体在入口调整机构的上游限定一系列声腔，并且开口被